          [:gmd:processingLevel
           [:gmd:MD_Identifier
            [:gmd:code (char-string (-> c :ProcessingLevel :Id))]
-           [:gmd:codeSpace (char-string "gov.nasa.esdis.umm.proessinglevelid")]
+           [:gmd:codeSpace (char-string processing-level-code-space-string)]
            [:gmd:description (char-string (-> c :ProcessingLevel :ProcessingLevelDescription))]]]]]
        (sdru/generate-service-related-url (:RelatedUrls c))
        (aa/generate-content-info-additional-attributes additional-attributes)

         [:gmd:processingLevelCode
          [:gmd:MD_Identifier
           [:gmd:code (char-string (-> c :ProcessingLevel :Id))]
           [:gmd:codeSpace (char-string "gov.nasa.esdis.umm.proessinglevelid")]
           [:gmd:description (char-string (-> c :ProcessingLevel :ProcessingLevelDescription))]]]]]
       (let [related-url-distributions (sdru/generate-distributions c)
             data-center-distributors (data-contact/generate-distributors (:DataCenters c))]

    "structure"
    "transportation"
    "utilitiesCommunication"})

(def processing-level-code-space-string "gov.nasa.esdis.umm.processinglevelid")

(defn- generate-projects-keywords
  "Returns the content generator instructions for descriptive keywords of the given projects."
